Leadership Team

Colin Hill

Colin Hill

CEO, President, Chairman, and Co-Founder

Colin Hill co-founded GNS Healthcare in 2000 and has served as CEO since then. He brings years of hands-on scientific experience to his role, with expertise in the areas of computational physics, systems biology, and personalized medicine. He also serves as Chairman of GNS Healthcare’s parent company Via Science, a leading big data analytics company focused on business intelligence, finance, and economic forecasting. He also serves on the Board of Directors of AesRx, a biopharmaceutical company dedicated to the development of new treatment for sickle cell disease. Colin was the founding chairman of O’Reilly Media’s Strata Rx, one of the first healthcare big data conferences.

In 2004, Colin was named to MIT Technology Review’s TR100 list of the top innovators in the world under the age of 35. He is a frequent speaker at national and international scientific and industry conferences and has been quoted in in numerous publications and television programs, including The Wall Street Journal, CNBC Morning Call, Nature, Forbes, Wired, and The Economist. He graduated from Virginia Tech with a degree in physics and earned masters degrees in physics from both McGill University and Cornell University.


Iya Khalil, Ph.D.

Executive Vice President and Co-Founder

Iya Khalil is responsible for initiating and developing GNS Healthcare’s partnerships with pharma, biotech, and academia. In addition, she oversees the execution of projects in these areas.

She has extensive experience in creating and applying computational approaches that leverage large-scale genomic, clinical, and molecular data for healthcare innovation. Prior to joining GNS Healthcare, she worked at Cornell University, the University of Washington, and Abbott Labs.

A frequent speaker at industry events and conferences, Iya is an inventor on a number of pending patents and has published multiple articles on in silico technologies applied to drug discovery and development. She is also a co-founder and board member of the New Libya Foundation, a non-profit organization dedicated to nurturing the development of civil society organizations in Libya. Iya holds a B.S. in physics from the University of Washington and a Ph.D. in physics from Cornell University.

Mark Pottle, M.B.A.

Mark Pottle, M.B.A.

Chief Financial Officer

Mark Pottle is responsible for the finance, accounting, legal, and human resource functions of GNS Healthcare.

Before joining GNS Healthcare, Mark was CFO of N-of-One Therapeutics, which provides analysis and interpretation of a tumor’s genome so that providers can personalize cancer treatments for patients. Prior to N-of-One, Mark worked at Picis Inc., which provides EMRs for emergency departments, ICUs, and ORs. After Picis was sold to United Healthcare/Optum in 2010, Mark became the CFO of Optum’s Accountable Care Organization division. Mark has also previously worked at several start-up to mid-level companies and has helped raise over $50 million of venture-backed funding, as well as over $150 million in private equity funding.

Mark is also a veteran of the U.S. Army. He graduated from University of New Hampshire with a degree in economics and holds an M.B.A. from Southern New Hampshire University.

Carol McCall, FSA, MAAA

Carol McCall, FSA, MAAA

Chief Product Officer

Carol McCall leads the development of new products at GNS Healthcare and oversees the execution of projects for real world outcomes.

Carol is a health actuary with a background in innovation, predictive analytics and health services design. Her specialties are creating novel computational approaches that leverage big data in healthcare. She also designs services and business models that expand on the traditional notions of health, care, community and sustainability. Most recently, Carol served as Chief Innovation Officer at Tenzing Health, a subsidiary of Vanguard Health Systems, where she merged creative analytic approaches with innovations in health services that improved people’s health and dramatically reduced their healthcare costs.

Prior to joining Tenzing, Carol led the R&D efforts in Humana’s Innovation Center, where she pioneered using sophisticated analytic techniques to build a portfolio of prediction, knowledge discovery, and simulation models. She also launched Humana’s innovations in personalized medicine and led Humana’s Health Services Research Center (HSRC). Carol also served as Humana’s Chief Information Officer and as VP of Pharmacy Management. Prior to Humana, Carol served as EVP of Managed Care Business Development for Allscripts Healthcare Solutions and as an actuarial consultant for Milliman, an international provider of actuarial services.

Carol also helped launch Green Ribbon Health, LLC a Florida-based company creating innovations in health support services for seniors in Tampa, and later served on their board of directors. She served as a member of the National Committee on Vital and Health Statistics, a member of the HSRC’s governing board, and as advisor to the HRP Scientific Program Board. Carol is a member of the American Academy of Actuaries and a Fellow of the Society of Actuaries. She received a B.S. in actuarial science from University of Iowa.

Thomas Neyarapally, JD, MBA

Thomas Neyarapally, J.D., M.B.A.

Executive Vice President, Corporate Development

Tom Neyarapally leads GNS Healthcare’s business and corporate development activities, as well as the expansion, protection, and monetization of the company’s intellectual property.

Before joining GNS Healthcare, Tom served as an associate in the New York office of the law firm Frommer, Lawrence & Haug LLP, where he focused on transactional, product development, and litigation matters in the pharmaceutical and biotech industries. Tom was previously an associate in the corporate department practice at Chadbourne & Parke, LLP, and held the position of analyst at Arthur D. Little. While attending Cornell University’s Johnson Graduate School of Management, he served as a partner with BR Ventures, the Johnson School’s student-run venture capital firm.

Tom graduated from the University of Connecticut as an Honors Scholar with a B.S. in chemical engineering. He holds a J.D. and an M.B.A. from Cornell University and is a registered patent attorney.

Bruce Church, PhD

Bruce Church, Ph.D.

Chief Mathematics Officer

Bruce Church is responsible for developing algorithms for REFS™ and leading projects for the development of new products and technologies.

An expert in statistical physics, machine learning, parallel computing, and causal modeling, Bruce helped develop the original REFS™ platform. Previously, he spent ten years at Cornell University, developing global optimization methods for computational protein folding, the results of which have been published in several peer-reviewed journals.

Bruce has served as the principal investigator on several major grants, including a $2.5 million award from the Department of Energy. He has served on the Board of Directors for U.S. Rugby and coached the under-23 women’s Northeast rugby team. Bruce received a B.S. in applied and engineering physics and a Ph.D. in applied physics from Cornell University.


Lance Stewart

Vice President, Business Development, Payer Sales

Lance leads business and client development in the Payer space for GNS Healthcare and is actively involved with the product team to facilitate a market-based approach to product development.

Lance has an extensive background in healthcare, with over 25 years experience in U.S. and global markets.  His expertise has been built from leadership positions in organizations with products, services and solutions across population health, care management, claims, healthcare networks and pharmaceuticals. Lance most recently led sales and strategic client relationship efforts for the payer and infomediary markets at emids, a healthcare-specific global services and solutions provider located in Nashville and Bangalore.  Previous to emids, Lance was a senior sales executive at McKesson Health Solutions, with responsibility for products and care management services.  Mr. Stewart also amassed seven years experience in the consulting space.  Prior to his focus on healthcare IT, Lance served in multiple strategic roles at Merck, departing as Director, National Accounts for Integrated Health Systems.  During his tenure, he had market management responsibilities for ambulatory, acute care, long-term care, integrated delivery networks, PBM’s and managed care.

Lance is on the leadership committee for the Payer Provider Community at HIMSS as well as the IT Advisory committee at AHIP.  He holds a Bachelor of Arts degree from The University of Tulsa and has participated in multiple post-graduate executive programs.  Lance is actively involved in the U.S. Soccer Federation and the National Intercollegiate Soccer Officials Association.

Jason Laramie, Ph.D.

Vice President of Modeling

Jason leads a team of scientists that work on client projects utilizing a diverse set of datasets and endpoints across a variety of therapeutic areas.

Prior to joining GNS Healthcare, he was the Director of Collaborations for Complete Genomics leading world-wide corporate collaborations. Prior to Complete Genomics, he was a Principal scientist and Human Genetics Lead in the Applied Quantitative Geno-therapeutics group at Pfizer utilizing human genetics to inform both novel therapeutic target identification and clinical trial design.

Jason graduated from the University of Missouri, Columbia with a B.S. in Molecular Biology, Washington University in St. Louis with an M.S. in Computer Science, and Boston University with a Ph.D. in Bioinformatics. He has co-authored over 25 peer reviewed research articles.

John Kucera, M.B.A.

John Kucera, M.B.A.

Vice President of Informatics and Data Services

John Kucera leads GNS Healthcare’s informatics, data management, and client services efforts for new products.

John has extensive experience managing and utilizing healthcare data, measures, and analytics. He has a passion for building knowledge through innovative uses of data and information. Prior to joining GNS, John served as VP for Information Management and Finance at Tenzing, a subsidiary of Vanguard Health Systems, where he implemented an information management and decision support system, established and maintained financial reporting systems, and served as liaison between Tenzing and its clients.

Before joining Tenzing, John served in a variety of roles at Humana in Corporate Finance, Service Center Operations, Clinical Operations and, most recently, Director of Computational Health Intelligence in Humana’s Innovations Center. While in this role, John led a multidisciplinary team to develop algorithms, models, and applications to understand and predict consumer health and health behavior. John has previously worked for Kraft Inc, QVC Network, and several successful start-up companies.

John is a member of both the Clinical Workgroup and Business Workgroup of the Office of the National Coordination for Health Information Technology. He received a B.A. in social work/sociology from Marquette University and an M.B.A. from University of Wisconsin.

Bill Thornburg, M.B.A.

Bill Thornburg, M.B.A.

Vice President of Product Management

Bill Thornburg leads product management for new products at GNS Healthcare.

Bill brings extensive experience in enterprise software product marketing and management to GNS. Most recently, he served as Senior Vice President, Solution Marketing and Product Management at Medecision, a vendor of disease and case management workflow software. Prior to Medecision, Bill managed and marketed health care payer analytics solutions at OptumInsight. He has also managed products for datacenter automation at mValent, software development at Rational Software, and electronic publishing at Dataware.

Bill holds a B.S. in mathematics and computer science from Colorado State University and an M.B.A. from the University of Colorado.

Jim Dutton

Jim Dutton

Vice President of Product Development

Jim Dutton leads software development for new products at GNS Healthcare.

Prior to GNS, Jim was the Chief Architect and VP of Engineering at Caringo, a cloud storage infrastructure company, where he designed and built scalable storage software. He grew the engineering team from zero to forty senior engineers and managed six major software releases. Prior to that, he was CEO at the SaaS vendor Traq Wireless, a billing optimization service for enterprise-owned cellular phones. He was responsible for software development, IT production services and customer care with about 30 employees in each group. After being promoted to CEO by Traq’s board of directors, Jim grew the customer base, achieved seven consecutive months of profitability, signed two major reseller deals, built and released a new online procurement product, and prepared the company for a successful acquisition by Tangoe, Inc. in 2005.

Jim holds a M.S. in Computer Science from the University of Texas at Austin and a B.S. in Applied Mathematics from Florida Institute of Technology. He is inventor on a number of US and International patents for topics including Wireless Communication Billing Optimization, Generalized Namespaces, and Adaptive Power Conservation for Massively Scalable Storage Clusters.